JP3231126B2 - Optical connector core position measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector core position measuring apparatus for measuring the eccentricity between the design position of an end face of an optical connector to be measured and the position of an optical fiber actually fixed.

[0002]

2. Description of the Related Art Conventionally, techniques in such a field include:
For example, "High-precision Dimension Measurement Technology for Multi-core Connectors"
3rd year IEICE Fall National Convention, B-343).

FIG. 18 is a block diagram showing a conventional optical connector core position measuring device.
Is set on an XY stage (not shown, a movable stage in the X and Y directions), and measurement light is emitted from the light source 302 to the rear end face. An image pickup device 304 such as a CCD is disposed on the front end face side of the optical connector 301 for measurement with an objective lens 303 interposed therebetween, and an image of the front end face of the optical connector 301 for measurement is formed on the image pickup device 304. .

Here, the optical connector 301 to be measured is provided with two guide pin holes 305 on both sides, and a number of fiber holes 306 are formed between them. For this reason, the measurement light emitted from the light source 302 passes through the guide pin hole 305 and the fiber hole 306 and becomes the transmission measurement light to enter the imaging device 304. The image processing apparatus 307 includes the optical connector 3 for measurement.
The image data of the measurement light from the front end face of the light-emitting element 01 is given.

[0005] Therefore, the image processing device 307 can determine the contour of the edge of the front end face of the guide pin hole 305 and the fiber hole 306, and the center position of the guide pin hole 305 and the fiber hole 306 can be obtained from the result. Therefore, if the measured center position is compared with the designed center position, the so-called eccentric amount and eccentric direction are obtained,
Product evaluation becomes possible. Note that the CRT 308 displays the imaging data and the measurement result so as to be visible.

[0006]

As described above, the conventional optical connector core position measuring apparatus can evaluate the eccentricity (deviation between the designed position and the actual position) of the fiber hole. Due to the presence of the clearance, the eccentricity of the optical fiber inserted here cannot be evaluated. Therefore, when an optical fiber is inserted and actually used as an optical connector, there is a problem that a suitable optical coupling cannot be performed.

In addition, the guide pin hole, which is a reference for positioning, has a problem that "sagging" is apt to occur at the front end face due to polishing, and the center position cannot be calculated accurately.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and is directed to a core of an optical connector for detecting a deviation between a design position of an end face of an optical connector to be measured and a position of an optical fiber actually fixedly arranged. It aims to obtain a position measuring device.

[0009]

According to a first aspect of the present invention, there is provided an optical connector core position measuring apparatus, comprising: a light source for transmitting light to a rear end face of an optical fiber having a front end face fixedly arranged at a predetermined pitch on an end face of an optical connector to be measured; An electrostrictive element that emits measurement light via the optical branching member and supports a reference optical connector in which the front end face side of each optical fiber is fixedly arranged at a design position on the end face, facing the end face of the optical connector to be measured. Is moved in a circular motion by the circular motion controller, and in the position detecting means, for each optical fiber on the side of the optical connector to be measured, the measurement transmitted via the reference optical connector which is circularly moving to each installed detector. Each of the optical fibers is detected, and for each of the core positions of the optical fibers on the optical connector to be measured, the opposing optical fiber on the reference optical connector side is determined from the phase difference between the circular motion and the variation in the light quantity of the measuring light. With obtaining the eccentric direction from Iba center it is characterized by determining the eccentricity of the opposing optical fiber of the reference optical connector side from the amplitude of the light quantity variation.

[0010] In particular, the reference optical connector and the optical connector to be measured insert a dummy pipe having a through hole at the center thereof in order to specify the center position of the guide pin hole formed on the end face. An optical fiber is inserted into the through hole of the dummy pipe so that the measurement light passes through the center of the guide pin hole.

According to a fourth aspect of the present invention, there is provided a core position measuring device for an optical connector, wherein the front end face of the optical fiber is fixedly arranged at a predetermined pitch, and the front end face of the optical fiber to be measured is opposed. The electrostrictive element supporting the reference optical connector fixedly arranged at the upper design position is circularly moved by the circular motion controller, and the position detecting means is circularly moved for each optical fiber on the optical connector side to be measured. A light source that emits measurement light through a reference connector, and a detection unit including a detector that detects reflected light from each optical fiber on the side of the optical connector to be measured transmitted through the reference connector. The core position of each optical fiber on the side of the optical connector to be measured is determined based on the phase difference between the circular motion and the variation in the amount of reflected light. With obtaining the eccentric direction from,
It is characterized in that the amount of eccentricity from the center of the opposing optical fiber on the reference optical connector side is obtained from the amplitude of the light quantity fluctuation.

In particular, in the reference optical connector, a dummy pipe having a through hole in a center portion is inserted in order to specify a center position of a guide pin hole formed for determining a joining position, and further inserted into the through hole. An optical fiber is inserted, but as an application example of the above-described reference optical connectors, an optical fiber is fixedly arranged at a center position of a guide pin hole formed for determining a joining position.

The optical connector core position measuring device according to claim 8 is a guide pin hole formed in the circularly moving reference optical connector in the optical connector core position measuring device according to claim 1 or 4. Instead of this, an optical fiber for specifying the position is fixedly arranged at the center position of the guide pin hole.

Further, a pattern having the same diameter as the core diameter of each optical fiber on the side of the optical connector to be measured and transmitting the measuring light and its reflected light has a predetermined design pitch at which these optical fibers are to be fixedly arranged. Wherein the reference member is attached to the end surface of the reference optical connector which is circularly moving in the optical connector core position measuring device according to claim 1, 4, or 8. I have.

In the optical connector core position measuring device according to the eleventh aspect, each of the optical fiber patterns on the side of the optical connector to be measured has the same diameter as that of the optical fiber on the side of the optical connector to be measured. Prepare a reference member that is formed at a design pitch to be fixedly arranged, and an electrostrictive element that supports this reference member in opposition to the optical connector for measurement,
The circular motion is performed by the circular motion controller, and in the position detecting means, for each optical fiber on the optical connector side to be measured,
A light source that emits measurement light to the rear end face of the optical fiber on the optical connector side to be measured, and an optical fiber on the optical connector side to be measured that reflects reflected light reflected by the pattern formed on the surface of the circular reference member. A detection unit consisting of a detector for detecting through the optical fiber is provided, and the core position of each optical fiber on the side of the optical connector to be measured is determined based on the phase difference between the circular motion and the variation in the amount of reflected light. The eccentricity direction from the center of the pattern formed on the reference member surface is obtained from the amplitude of the light quantity variation, as well as the eccentric direction from the center of the pattern formed on the reference member.

In particular, in the optical connector under test, a dummy pipe having a through hole at the center portion is inserted in order to specify the center position of the guide pin hole formed on the end face thereof.
Further, an optical fiber is inserted into the through hole of the dummy pipe so that the measurement light and the reflected light pass through the center of the guide pin hole.

[0017]

In the optical connector core position measuring apparatus according to the present invention, an electrostrictive element for supporting a reference optical connector facing an end face of an optical connector to be measured or a reference member having a pattern for transmitting or reflecting measurement light is used. By moving the reference optical connector or the reference member, the amount of measurement light or reflected light that fluctuates due to the rotation and the phase difference of the circular movement are detected, whereby the optical connector on the side of the measured optical connector is detected. The eccentric direction and the amount of eccentricity between the core position and the design position of each optical connector are obtained.

A pattern having the same diameter as the core diameter of each optical fiber on the side of the optical connector to be measured and transmitting the measuring light and its reflected light is a predetermined design in which these optical fibers are to be fixedly arranged. By attaching the reference member formed at the pitch to the end face of the reference optical connector which is supported by the electrostrictive element and is moved in a circular motion, each optical fiber fixedly arranged on the reference optical connector side has its core. It is not necessary to match the diameter with the core diameter of the optical fiber on the optical connector side to be measured.

A pattern having the same diameter as the core diameter of each optical fiber on the side of the optical connector to be measured and reflecting the measuring light is formed at a predetermined design pitch at which these optical fibers are to be fixedly arranged. By supporting the reference member on the electrostrictive element, there is no need to produce a reference optical connector in which the optical fiber is accurately fixed at the design position.

In the reference optical connector and the optical connector to be measured, a dummy pipe having a through hole at the center portion is inserted into the guide pin hole, and an optical fiber is inserted into the through hole of the dummy pipe to guide the guide pin hole. By passing the measurement light or the reflected light through the center of the guide pin, the center positions of the guide pin holes are accurately specified.

Further, the above-mentioned reference optical connector is replaced with a guide pin hole formed for determining a joining position.
By fixing the optical fiber at its center position,
The structure for specifying the center position described above is not required.

Further, the measuring light used for specifying the position has a wavelength longer than the cut-off wavelength of the core in each optical fiber, so that these optical fibers are guaranteed to be single-mode. In detecting light, a light source is installed on the rear end face side of these optical fibers to detect measurement light directly passing through the optical fiber, and the reflectivity on the rear end face side of the optical fiber is substantially constant (3.5). %), A light source can be installed on the front end side of the optical fiber, and this reflected light can be used.

[0023]

1 to 17 show an embodiment of the present invention.
This will be described with reference to FIG. In the drawings, the same portions are denoted by the same reference numerals, and description thereof is omitted.

FIG. 1 is a block diagram showing the configuration of an embodiment of an optical connector core position measuring apparatus according to the present invention. The optical connector 4b to be measured is fixed to the stage 3b, and in order to measure the core position of each optical fiber 8 fixedly arranged on the end face, it is confirmed that each optical fiber 7 is in a design position in an opposite position in advance. The reference optical connector 4a is fixed to the stage 3a. Further, the reference optical connector 4a is supported by the electrostrictive element 2 whose circular motion is controlled by the circular motion controller 1.

A light source 11 is provided on the side of the optical connector 4b to be measured, and a rear end face of each optical fiber 8 connected from the light source 11 by a connecting member 9 via a light branching member 10. The measurement light is emitted to Note that the wavelength of the measurement light emitted from the light source 11 is longer than the cutoff wavelength of the core in each of the optical fibers 8, thereby ensuring that each of the optical fibers 8 is in the single mode. .

On the other hand, on the reference optical connector 4a side, detectors 12a to 12
g is provided, and the outputs of the detectors 12a to 12g and the output of
, The eccentric direction and the amount of eccentricity from the center of each opposing optical fiber 7 on the reference optical connector 4a side are calculated for each optical fiber 8 on the measured optical connector 4b side.
The position detector A is constituted by the detectors 12a to 12g and the CPU 13.

At this time, the reference optical connector 4a and the optical connector 4b to be measured have one or two or more optical fibers 7, 8 fixedly arranged at their end faces at a predetermined pitch. At least two guide pin holes 12 are provided. And these guide pin holes 5
Dummy pipes 6a and 6b each having a through hole at the center are inserted into a and 5b, and optical fibers 7 and 8 for passing the measurement light from the light source 11 are inserted respectively.

In particular, each of the detectors 12a to 12g in the position detecting means A detects the measuring light transmitted from each optical fiber 7 on the side of the reference optical connector 4a with the light receiver 121 as shown in FIG. After the detection signal is amplified by the amplifier 122, the first and second phase detectors 123a and 123a
At b, the phase in the x direction and the phase in the y direction (the phase of the detected light quantity fluctuation of the measurement light) are detected. The detected signal is a reference signal 1 in the circular motion controller 1.
04 together with the first and second A / D converters 124a, 124a,
At 24b, it is converted into a digital signal and sent to the CPU 13 as a calculation parameter.

In the CPU 5, each of the detectors 12a to 12
g, the reference signal 104 indicating the circular movement of the electrostrictive element 2 and the phase difference between the reference light connector 4a and the variation in the amount of measurement light transmitted through the optical fibers 7 on the reference optical connector 4a. The eccentric direction from the center of the opposing optical fiber 7 is calculated, and the amount of eccentricity from the center of the opposing optical fiber 7 on the reference optical connector 4a side is calculated from the amplitude of the light amount fluctuation.

In the circular motion controller 1, FIG.
As shown in (b), the sin in each of the x and y directions for circular movement output from the sin wave generation circuit 101 is shown.
The circular motion control unit 102 controls the circular motion of the electrostrictive element 2 by the wave, and the xy control unit 103
In accordance with an instruction from the PU 13, a voltage for finely moving the electrostrictive element 2 in the X-axis or Y-axis direction is supplied.

Next, the operation of the present invention will be described.

First, a reference optical connector 4a serving as a measurement reference
Is fixed to the stage 3a in advance, and is supported by the electrostrictive element 2 that moves in a circular motion. The optical connector 4b to be measured is set so as to face the reference optical connector 4a supported by the electrostrictive element 2. 3b.

Prior to the measurement, an optical branching member 10 is connected to a rear end face of each optical fiber 8 on the side of the optical connector 4b to be measured by a connecting member 9 before the measurement. Light splitting member 10 for emitting measurement light
The light source 11 is connected via the.

At this time, the guide pin hole 5 formed to determine the joining position on the optical connector 4b to be measured.
At the center of b, as shown in FIG. 3B, a dummy pipe 6b having a through hole at the center is inserted, and an optical fiber 8b is inserted into the dummy pipe 6b.
(FIG. 2A is a diagram showing an end face of the optical connector 4b to be measured. In particular, an optical fiber used for optical joining is shown by 8a in the figure, and is used to specify the center position of the guide pin hole 5b. The optical fiber is indicated by 8b in the figure).

In this embodiment, the reference optical connector 4a
3C has the same structure for specifying the center position of the guide pin hole 5a, and FIG. 3C shows an end face of the reference optical connector 4a. Thus, the guide pin hole 5a
By specifying the center 14 of the optical connector 4b, the relative positional relationship with the end face of the optical connector 4b for measurement can be specified.

Further, as shown in FIG. 4, the reference optical connector 4a and the optical connector 4b to be measured, which are constructed as described above, are installed with their respective end faces 15 facing each other.
And the reference optical connector 4a and the optical connector 4 to be measured.
b, the respective front end face 15 of each optical fiber 7, 8
a are installed so as to face each other.

In the first operation stage, first, the relative position of each optical fiber 8 fixedly arranged on the end face of the optical fiber 4b to be measured must be specified.

[0038] This is because, in a state of being simply opposed,
Core 1 in each optical fiber 7 on the reference optical connector 4a side
5a and the core 15b of each optical fiber 8 on the side of the optical connector 4b to be measured, as shown in FIG.
This is because 150b is in an eccentric state, and even if eccentricity information is obtained in this state, an error in installation of the optical connector for measurement 4b is not taken into account, so that accurate measurement cannot be performed.

For this reason, the CPU 13 first instructs the circular motion controller 1 to perform circular motion control, thereby causing the reference optical connector 4a to circularly move with the electrostrictive element 2 supported (the electrostrictive element 2 is a circular motion controller). 1). On the other hand, in the position detecting means A, each of the optical fibers 7 on the side of the reference optical connector 4a which is moving circularly.
Detectors 12a to 12c that detect the measurement light transmitted through
Among the detectors 12f, 12f, 12g, which detect the measurement light transmitted through the optical fiber that specifies the guide pin hole 5a,
Using the output from 2g, the relative eccentric direction between the end face of the reference optical connector 4a and the end face of the optical connector 4b to be measured is determined from the phase difference between the circular motion and the detected light quantity fluctuation of the measurement light and the amplitude of the light quantity fluctuation. And the amount of eccentricity is calculated.

Further, the CPU 13 performs the first
The eccentricity information of each of the guide pin holes 5a and 5b calculated in the operation stage of the optical connector 4b for each optical fiber 8 fixedly arranged on the end face of the optical connector 4b for measurement is
As the correction information for specifying the design position (the original position) where the end face is shifted in the same manner as the end face is shifted,
Record each one.

This is because it is actually difficult to accurately fix the end face of the optical connector 4b to be measured to the end face of the reference optical connector 4a as described above.

Here, referring to FIG. 6 and FIG.
And the circular motion control by the circular motion controller 1 will be described.

First, FIG. 6 is a perspective view (a) and a sectional view (b) showing the electrostrictive element 2. An optical fiber 7 fixed to the end face of the reference optical connector 4a is inserted into the electrostrictive element 2 from the rear side (left side in the figure). A unit is provided. That is, the piezoelectric material layer 16 is deposited on the ground electrode 201 _G provided on the outer surface of the tip of the electrostrictive element 2, and four more electrodes 20 are formed on the upper surface of the piezoelectric material layer 16.
_1X1 , _201X2 , _201Y1 , and _201Y2 are provided.

In particular, the plus X electrode 201 _X1 and minus X
The electrodes 201 _X2 are located at positions facing each other, and similarly, the plus Y electrodes 201 _Y1 and the minus Y electrodes 201 _Y2 are also located at positions facing each other. A cap 17 is provided in a lower opening (right side in the drawing) of the electrostrictive element 2, and the cap 17 has a reference connector 4a fixed to the stage 3a.
Is supported.

According to the above structure, the tip of the electrostrictive element 2 can be finely or rotationally moved horizontally (horizontally with respect to the end face of the optical connector 4b to be measured). The tip is also made to move according to the above movement. This is shown in FIG.
(B).

When a voltage having the pattern shown in FIG. 7B is applied to each of the electrodes shown in FIG. 7A, tensile or compressive strain is generated in the piezoelectric material layer 16, thereby causing the electrostrictive element 2.
Are slightly deformed, and fine movements in the displacement directions (circles 1 to 4) of the arrows shown in FIG.

Accordingly, the xy controller 103 _sends 180 _degrees to the plus X electrode 201 _X1 and the minus X electrode 201 _X2 .
When a sine wave voltage out of phase is applied and the sine wave voltage out of phase by 90 ° is applied to the plus Y electrode _201Y1 and the minus Y electrode _201Y2 , the tip of the electrostrictive element 2 rotates. I do. In addition, the electrodes 201 _{X1 to} 20
When the DC bias of the AC voltage applied to 1 _Y1 changes, the tip of the electrostrictive element 2 slightly moves in the direction orthogonal to the end face of the reference optical connector 4a.

That is, the high-speed rotational movement of the reference optical connector 15a and the fine adjustment of the horizontal rotational center position are performed by the same electrostrictive element 2.

Next, in the second operation stage, the CPU 13 issues an instruction for circular motion control to the circular motion controller 1 and the measuring light (reference optical connector 4a) detected by each of the detectors 12a to 12e in the position detecting means A. Transmitted through each optical fiber 7 fixedly disposed on the optical connector 4b on the side of the optical connector 4b to be measured by utilizing the light amount fluctuation of the optical fiber 7 except the optical fiber for specifying the guide pin hole 5a). Optical fiber 8
Each of the opposing optical fibers 7 on the reference optical connector 4a side
The eccentric direction and the amount of eccentricity of the core position are sequentially obtained while correcting using the eccentricity information calculated in advance in the first operation stage.

Here, referring to FIGS. 8 and 9, the eccentricity between the rotation center of the optical fiber 7 on the reference optical connector 4a side and the center of each optical fiber 8 on the optical connector 4b to be measured opposing thereto. The principle of calculating the direction and the amount of eccentricity (the distance from the center position) (performed by the position detecting means A) will be described.
However, here, only a pair of optical fibers will be described for convenience of explanation.

First, in FIG. 8A, a solid circle (15a in the figure) indicates a core in the optical fiber 7 on the reference optical connector 4a side, and a dotted circle (15b in the figure) indicates light to be measured. The core in the optical fiber 4b on the connector 4b side is shown. The center of rotation of the optical fiber 7 on the reference optical connector 4a side (white circle 150a in the figure) is the center of the optical fiber 8 on the optical connector 4b to be measured (cross mark 150 in the figure).
FIG. 3B shows a case where the light beam is deviated by a certain amount in the minus x direction from FIG. The position of the core in each optical fiber 7 on the side of the rotating reference optical connector 4a changes as shown by a circle 1 to a circle 5 in the figure. The optical coupling ratio of the optical fiber 8 facing the optical connector 4b changes in accordance with the rotation phase.

In FIG. 8, (b) to (f) correspond to FIG.
9A shows the positional relationship between the core 15a of the optical fiber 7 on the side of the reference optical connector 4a and the core 15b of the optical fiber 8 on the side of the optical connector 4b for measurement shown in FIG. Reference numeral 151e indicates the actual center position of the optical fiber 7 on the reference optical connector 4a side during the circular motion.

Here, the measurement light emitted from the light source 11 and having passed through the optical fibers 8 on the optical connector 4b for measurement via the optical branching member 10 is converted into respective light beams on the side of the reference optical connector 4a that is moving circularly. Each of the detectors 12a to 12a through the optical fiber 7
2e (the detectors 12f and 12g are used only in the first operation stage), and the change in the amount of the measurement light is caused by the optical fiber 7 on the reference optical connector 4a side and the light to be measured. Optical fiber 8 facing connector 4b
This corresponds to the variation of the optical coupling ratio with the optical fiber.

Accordingly, the positional relationship between the center of rotation of the optical fiber 7 on the side of the reference optical connector 4a and the center of the optical fiber 8 on the side of the optical connector to be measured, the phase of the rotation and the detectors 12a to 12e determine FIG. 9 shows the relationship between the detected light quantity fluctuation of the measuring light and the phase.

That is, FIG. 9A shows the core 15 in the optical fiber 7 on the reference optical connector 4a side.
The center position 150a of the optical fiber 8a on the side of the optical connector 4b to be measured deviates from the center position 150b of the core 15b in the minus x direction (left side in the figure). It can be seen that the phase of the light quantity fluctuation coincides with the phase of the light quantity fluctuation (phase difference 0 °).

FIG. 11B shows a positional relationship shifted in the minus y direction (downward in the figure). In this case, the phase difference is 90 °, and FIG. 10C is a plus x direction (right side in the figure). ) Shows a positional relationship shifted in this case, and the phase difference in this case is 180 °, and FIG. 4D shows a positional relationship shifted in the positive y direction (upward in the figure), and the phase difference in this case is 270 °. You can see that.

The calculation of the deviation direction is performed by the CPU 13 shown in FIGS. That is, FIG.
The waveform of the rotational motion below (d) is obtained from each of the detectors 12a from the sine wave generation circuit 101 in the circular motion controller 1.
12e are input to the detectors 12a to 12e, are received by the light receiver 121, are amplified by the amplifier 122, and are amplified by the first and second phase detectors 123a, 123e. It is the waveform of the signal respectively input into 123b.

In the first operation stage, the detectors 12a to 12g are also used for the detectors 12a to 12g.
The same operation as in e is performed, and the CPU 13 similarly calculates eccentricity information between the guide pin holes 5a and 5b.

On the other hand, FIG. 11 shows the relationship between the amplitude of the light quantity fluctuation and the eccentricity. As shown in FIGS. 7A to 7D, the core 1 in each optical fiber 8 on the optical connector 4b to be measured is provided.
The center position 150a of the core 15a in each optical fiber 7 on the reference connector 4a side with respect to the center position 150b of the core 5b
If the center of rotation is not deviated too much, the amplitude of the fluctuation in the amount of light received by the light receiver 121 is small (especially, the amplitude becomes 0 if the center positions match as shown in FIG. ),
As the deviation increases, the amplitude of the light amount fluctuation also increases.

When the value exceeds a certain value (approximately 2.5 μm between single mode fibers), the amplitude decreases as the deviation increases, and FIG. 12 shows this. In FIG. 12, when the detection level is equal to or lower than the level (specified value) indicated by the dotted line, the signal component is buried in the noise component. Either it is in the range where it is considered that the cores (the core positions match) or the center position is largely off.

The calculation of the eccentric direction and the eccentric amount is performed by the CPU 13 shown in FIG. That is, FIG.
The waveforms of the rotational motion under (a) to (d) are obtained from the sine wave generation circuit 101 in the circular motion controller 1 and the first and second phase detectors 12 in the detectors 12a to 12g.
3a and 123b are waveforms of the reference signal 104 input to the respective detectors 12a and 123b.
To 12 g, the light is received by the
2 and the first and second phase detectors 123a, 123a,
23b shows the waveforms of the signals respectively input to the reference numerals 23b.

The output E _{SX of} the first phase detector 123a and the output E _SY of the second phase detector 123b are shown in FIG.
When there is a phase difference θ _S between the waveform of the rotational movement and the fluctuation of the light amount as shown in FIG. 7, the center position 150a of the core 15a of each optical fiber 7 on the reference connector 4a side and the core 15b of the measured optical fiber 8 are measured. the center position 150b since a positional relationship as shown in FIG. (b), the following equation (x _{side) E SX = E S · cosθ} S ··· (1) (y side) E _SY = E _S · cos (θ _S -90 °) = obtained by _{E S · sinθ S ··· (2} ).

Therefore, the CPU 13 sets the first and second A /
Through the D converters 124a and 124b, the first and second
The outputs E _SX and E _SY of the phase detectors 123a and 123b are taken in, respectively, and the eccentric direction θ and the eccentric amount d are calculated.

The calculation of the eccentric direction θ and the eccentric amount d is as follows.
Since it is known that the relationship between the amount of eccentricity and the amplitude of the light quantity fluctuation is as shown in FIG. 12, the actual eccentric direction θ
_S and the amount of eccentricity d ′ and the eccentricity information obtained in advance in the above-described first operation stage (the error P _X in the x direction and the error P _{Y in the} y direction known in advance when fixed) are corrected. Is obtained from the following formula.

Θ = tan ⁻¹ ((d ′ · sin θ _S −
P _Y ) / (d ′ · cos θ _S −P _X ))

[0066]

(Equation 1)

FIG. 13 is a block diagram showing the configuration of an embodiment of the optical connector core position measuring device according to the fourth aspect. In this embodiment, the optical connector 4b to be measured is fixed to the stage 3b in the same manner as in the first aspect of the present invention. A reference optical connector 4a, which has been confirmed in advance at a position where each optical fiber 7 is at a design position, is fixed to the stage 3a. Further, the reference optical connector 4a is supported by the electrostrictive element 2 whose circular motion is controlled by the circular motion controller 1.

The light source 11 as shown in FIG. 1 is not provided on the optical connector 4b for measurement.
That is, for each optical fiber 7 on the reference optical connector 4a side, a first light source 11a that emits measurement light via an optical coupler 18 on the rear end face of each optical fiber 7, and a side of the optical connector 4b for measurement. The reflected light reflected by the rear end face (indicated by C in the figure) of the optical fiber 8 and transmitted through the optical fiber 7 on the side of the reference optical connector 4a which is circularly moved is converted into an optical coupler 18. Detector 12 which detects through
(that is, for example, the light emitted from the first light source 11a and reflected by the rear end face C of the facing optical fiber 8 is used for measuring the core position). Use).

The wavelength of the measuring light emitted from the first light source 11a or the like is longer than the cut-off wavelength of the core of each optical fiber, so that each optical fiber is in a single mode. The number of the detecting portions B is equal to the number of optical fibers for measuring the core position and the number of optical fibers for specifying the center of the guide pin holes 5a and 5b. Is composed.

Therefore, on the side of the optical connector 4b to be measured, the front end face of each optical fiber 8 is simply fixed, and the rear end face C of each optical fiber 8 is shown in FIG.
As shown in (b), the measurement light that has passed through the fiber is reflected (the end face reflectivity is approximately 3.5%).

The reference optical connector 4a and the optical connector under test 4b have at least two
The guide pin holes 12 are provided. Dummy pipes 6a and 6b each having a through hole at the center are inserted into the guide pin holes 5a and 5b.
Optical fibers 7 and 8 for passing the measurement light from are inserted.

In particular, for example, the first detector 12a in the position detecting means has the same structure as that of FIG.
The reflected light transmitted from each optical fiber 7 on the side of the reference optical connector 4a is detected by the light receiver 121, and the detection signal is amplified by the amplifier 122, and then the first and second phase detectors 12 are used.
At 3a and 123b, the phase in the x direction and the phase in the y direction (the phase of the fluctuation in the amount of detected reflected light) are detected. The detected signal is converted into a digital signal by the first and second A / D converters 124a and 124b and sent to the CPU 13 as calculation parameters. In this embodiment, only the structure of the first detector 12a has been described, but the structure of the other detectors is the same.

In the CPU 13, the first detector 12a
The phase difference between the circular motion and the light quantity fluctuation is determined from the output sent from the
The direction of eccentricity from the center is calculated, and the amount of eccentricity from the center of the opposing optical fiber 7 on the side of the reference optical connector 4a is calculated from the amplitude of the light amount fluctuation.

On the other hand, in the circular motion controller 1, similarly to FIG. 2B described above, each of the si and x directions for the circular motion output from the sine wave generation circuit 101 is used.
The circular motion control unit 102 controls the circular motion of the electrostrictive element 2 by n waves, and the xy control unit 103 controls the electrostrictive element 2 to move the X-axis or Y-axis in accordance with an instruction from the CPU 13.
A voltage for fine movement in the axial direction is supplied.

Next, the operation of the present invention will be described.

According to a fourth aspect of the present invention, there is provided the optical connector core position measuring device according to the first aspect of the present invention, wherein the installation position of the light source 11 (FIG. 1) is changed to the light to be measured. Instead of the rear end face of each optical fiber 8 fixedly arranged on the end face of the connector 4b, the reference optical connector 4a
There is a characteristic in changing to the side.

As shown in FIG. 13B, the rear end face of the optical fiber 8 on the side of the optical connector 4b to be measured (FIG.
Since the reflectance of the measurement light at (a) is indicated by a symbol C) is substantially constant (3.5%), the measurement light is not used directly for core position measurement, but the reflected light is used. This is because core position measurement is also possible.

Accordingly, in the first operation stage, the center position of the guide pin holes 5a and 5b is determined to determine the relative position between the end face of the optical connector 4a and the end face of the optical connector 4b to be measured. The operation of causing the reference optical connector 4a to make a circular motion by controlling the circular motion of the reference optical connector 4a, the calculation operation by the CPU 13, and the like are the same as those in the above-described embodiment.

In the first and fourth embodiments of the present invention, the guide pin hole 5a is formed in the reference optical connector 4a similarly to the optical connector 4b to be measured. Is the optical connector 4b to be measured.
Since it is for measuring the core position in each optical fiber 8 on the side (reference member), the guide pin hole 5a
Is not really necessary.

Therefore, as shown in FIG. 14, when the guide pin hole 5a is formed, the optical fiber 7a (the optical fiber 7a and the optical fiber
The optical fiber 7 on the side of the reference optical connector 4a is configured by b) to form the reference optical connector 4a, so that the above-described configuration for inserting the dummy pipe 6a can be omitted.

In the first and fourth embodiments of the present invention, since the measuring light or the reflected light is transmitted through each optical fiber 7 on the side of the reference optical connector 4a in a non-contact manner (optical coupling), the core of the optical fiber 7 is provided. Although the diameter has to be the same as the diameter of the optical connector 4b to be measured, a reference member 19 having a light transmitting pattern E as shown in FIG. 15A may be attached to the end face of the reference optical connector 4a. .

That is, as shown in FIG. 3B, the light transmitting pattern E is formed on a thin glass substrate by photolithography using the optical fiber 8 on the side of the optical connector 4b to be measured. The pattern has the same diameter as the core diameter (the other portions function as light-shielding plates), and the interval between these patterns is accurately set at the design pitch (the optical fiber 8 on the optical connector 4a side to be measured should be fixedly arranged. The reference member 19 having the same pitch is attached to the end face of the reference optical connector 4a as shown in FIG.

As a result, the core diameter of each optical fiber 7 on the reference optical connector 4a side is
There is no need to match the core diameter of each optical fiber 8 on the b-side, and this facilitates the production of the reference optical connector 4a.

This embodiment is also applicable to the embodiment shown in FIG.

Next, an embodiment of an optical connector core position measuring apparatus according to claim 11 will be described with reference to FIGS.

FIG. 16 is a block diagram showing the configuration of an embodiment of the optical connector core position measuring device according to the eleventh aspect. In this embodiment, the optical connector 4b to be measured is fixed to the stage 3b in the same manner as in the first aspect of the present invention, but the light reflective pattern F is applied to the reference optical connector 4a (FIG. 1). The reference member 20 is directly attached to the electrostrictive element 2 whose circular motion is controlled by the circular motion controller 1 so as to face the end face of the optical connector 4b for measurement.

Each of the optical fibers 8 on the side of the optical connector 4b to be measured is connected to position detecting means via a connecting member 9, and each of the optical fibers 8
The first light source 11a that emits the measurement light to the rear end face of each optical fiber 8 and the reflected light reflected by the light reflective pattern F on the reference member 20 attached to the circularly moving electrostrictive element 2 And the optical fiber 8 on the side of the optical connector 4b to be measured.
Is provided with a detection unit B including a first detector 12a for detecting reflected light transmitted through
For example, light emitted from the first light source 11a and reflected by the light reflective pattern F on the reference member is used for measuring the core position).

The wavelength of the measuring light emitted from the first light source 11a or the like is longer than the cutoff wavelength of the core of each optical fiber, so that each optical fiber is in a single mode. The number of the detecting portions B is equal to the number of optical fibers for measuring the core position and the number of optical fibers for specifying the center of the guide pin holes 5a and 5b. Is composed.

The optical connector for measurement 4b has at least two guide pin holes 5 for determining the joining position.
b, a dummy pipe 6b having a through hole at the center thereof is inserted into each of the guide pin holes 5b, and further, for example, an optical fiber 8 (8b) for passing measurement light from the first light source 11a. ) Is inserted.

Particularly, for example, the first detector 12a in the position detecting means has the same structure as that of FIG.
The reflected light transmitted from each optical fiber 8 on the side of the measured optical connector 4b is detected by the light receiver 121, and the detection signal is amplified by the amplifier 122, and then the first and second phase detectors 123a and 123b are detected. Respectively detect the phase in the x direction and the phase in the y direction (the phase of the fluctuation in the amount of the detected reflected light). Then, the detected signal is divided into the first and second A /
The signals are converted into digital signals by the D converters 124a and 124b, and sent to the CPU 13 as calculation parameters. In this embodiment, only the structure of the first detector 12a has been described, but the structure of the other detectors is the same.

In the CPU 13, the first detector 12a
The phase difference between the circular motion and the light quantity fluctuation is obtained from the output sent from the
The direction of the eccentricity from the center is calculated, and the opposing light reflection pattern F on the reference member 20 is calculated from the amplitude of the light amount fluctuation.
Calculate the amount of eccentricity from the center.

On the other hand, in the circular motion controller 1, as in FIG. 2B described above, each of the si and x directions for the circular motion output from the sine wave generation circuit 101 is used.
The circular motion control unit 102 controls the circular motion of the electrostrictive element 2 by n waves, and the xy control unit 103 controls the electrostrictive element 2 to move the X-axis or Y-axis in accordance with an instruction from the CPU 13.
A voltage for fine movement in the axial direction is supplied.

Note that this light reflective pattern F corresponds to FIG.
(A) and (b), using a photolithographic technique on a thin glass substrate, the core diameter of each optical fiber 8 on the side of the optical connector 4b to be measured has the same diameter. The pattern (the other part functions as a light transmitting plate), and the interval between these patterns exactly matches the design pitch (the pitch at which the optical fiber 8 on the optical connector 4a side to be measured should be fixedly arranged). The reference member 20 is fixed to the support 21 and the electrostrictive element 2 is attached.

As a result, the above-described reference optical connector 4a becomes unnecessary, and the core position in each optical fiber 8 on the optical connector 4b to be measured can be measured more accurately by using a high-precision photolithographic technique. be able to.

Next, the operation of the present invention will be described.

The optical connector core position measuring device according to claim 11 is the same as the optical connector core position measuring device according to claims 1 and 4, except that the reference optical connector 4a (FIGS. 1 and 13) is used. The feature is that it is unnecessary.

As shown in FIG. 17, by using a high-precision photolithography technique, the core position and the center position of the guide pin 5b in each optical fiber 8 on the optical connector 4b to be measured can be accurately determined. This is because the pattern can be designed, whereby the core position in each optical fiber 8 on the side of the optical connector 4b to be measured can be measured more accurately than in the above-described embodiment.

Accordingly, the operation of determining the center position of the guide pin hole 5b in the first operation stage to determine the relative position between the surface of the reference member 20 and the end surface of the optical connector 4b to be measured, the circle of the electrostrictive element 2 The operation of causing the reference member 20 to perform a circular motion by controlling the motion, the calculation operation of the CPU 13, and the like are the same as those in the above-described embodiment.

[0099]

As described above, according to the present invention, a light source is measured via a light branching member from a light source to a rear end face of each optical fiber having a front end face fixedly arranged at a predetermined pitch on an end face of an optical connector to be measured. The electrostrictive element that emits light and supports the reference optical connector, which faces the optical connector end face to be measured and has the front end face side of each optical fiber fixed at the design position on the end face, is circularly moved by the circular motion controller. In the position detecting means, for each optical fiber on the optical connector side to be measured, each of the installed detectors detects the measuring light transmitted via the reference optical connector moving in a circular motion. For the core position of each optical fiber on the measurement optical connector side, the eccentric direction from the center of the opposing optical fiber on the reference optical connector side is calculated from the phase difference between this circular motion and the fluctuation in the amount of measurement light. In addition, since the eccentricity of the reference optical connector side from the opposing optical fiber is obtained from the amplitude of the light amount fluctuation, the reference optical connector or the reference member is rotated, and the measurement light or the measurement light fluctuated by the rotation is changed. It is possible to detect the amount of reflected light and the phase of this circular motion, and the eccentric direction and amount of eccentricity between the core position and the design position in each optical connector on the optical connector under measurement are parallel for each optical fiber. The effect is obtained.

In particular, a dummy pipe having a through hole at the center in a guide pin hole formed in the end face thereof is inserted into the reference optical connector and the optical connector to be measured, and further inserted into the through hole of the dummy pipe. Since the optical fiber is inserted to allow the measurement light to pass through the center of the guide pin hole, the center position of the guide pin hole can be specified accurately, and the measured surface of the reference optical connector end face or the reference member surface can be accurately measured. There is an effect that the relative positional relationship with the optical connector end face can be grasped.

The above-described effect can be obtained by irradiating the measuring light from the reference optical connector side and using the reflected light reflected by the measured optical connector side.

Further, a pattern having the same diameter as the core diameter of each optical fiber on the side of the optical connector to be measured and transmitting the measuring light and its reflected light has a predetermined design pitch at which these optical fibers are to be fixedly arranged. By preparing a reference member formed by the above, and by attaching this reference member to the end surface of the reference optical connector that is moving circularly, each optical fiber fixed to the reference optical connector has a core diameter of This eliminates the need to match the core diameter of the optical fiber on the side of the optical connector to be measured, thereby facilitating the manufacture of the reference optical connector.

In place of the above-mentioned reference optical connector, a pattern which has the same diameter as the core diameter of the optical fiber on the side of the optical connector to be measured and reflects the measuring light is fixedly arranged to each of these optical fibers. Since the reference member formed at the required design pitch is attached to the electrostrictive element that moves in a circular manner so as to face the optical connector to be measured, the optical fiber of the reference optical connector in which the optical fiber is accurately fixed at the design position is fixed. The effect is that production is completely unnecessary.

For the reference optical connector described above, an optical fiber having the same diameter as the core diameter of each optical fiber on the optical connector side to be measured is fixed and arranged at a position to be the center of the guide pin hole. Thus, there is an effect that a configuration for specifying the center of the guide pin hole (such as inserting a dummy pipe) becomes unnecessary.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of an optical connector core position measuring device according to claim 1;

FIG. 2 is a block diagram showing a configuration of a detector and a circular motion controller in the optical connector core position measuring device according to claim 1;

FIG. 3 is a diagram illustrating a method of detecting the center position of a guide pin hole in a reference optical connector and an optical connector to be measured.

FIG. 4 is a diagram showing a state in which a reference optical connector and an optical connector to be measured are installed facing each other.

FIG. 5 is a diagram showing a positional relationship between optical fibers on an end face of a reference optical connector and an end face of an optical connector to be measured.

FIG. 6 is a perspective view and a sectional view showing a configuration of an electrostrictive element according to the present invention.

FIG. 7 is a diagram for explaining the operation of the electrostrictive element according to the present invention.

FIG. 8 is a diagram for explaining the circular motion of the electrostrictive element according to the present invention based on the positional relationship between optical fibers fixedly arranged on the reference connector and the connector under test.

FIG. 9 is a diagram showing the relationship between the amplitude of the measurement light and the amount of positional deviation due to the positional relationship between the optical fibers fixedly arranged on the reference connector and the connector under measurement according to the present invention.

FIG. 10 is a diagram showing the relationship between the amplitude of measurement light and the amount of positional deviation due to the positional relationship between optical fibers fixedly arranged on the reference connector and the connector under measurement in the present invention.

FIG. 11 is a diagram showing the relationship between the phase difference of the measurement light and the displacement direction with respect to the circular motion due to the positional relationship between the optical fibers fixedly arranged on the reference connector and the connector under measurement in the present invention.

FIG. 12 is a diagram for explaining a method of calculating a position shift direction and a position shift amount of the position detecting means according to the present invention.

FIG. 13 is a block diagram showing one embodiment of an optical connector core position measuring device according to claim 4.

FIG. 14 is a diagram illustrating a configuration example of a reference optical connector according to the present invention.

FIG. 15 is a diagram illustrating a configuration example of a reference optical connector according to the present invention.

FIG. 16 is a block diagram showing one embodiment of an optical connector core position measuring device according to claim 10;

FIG. 17 is a diagram showing a configuration example of a reference optical connector according to the present invention.

FIG. 18 is a configuration diagram showing a conventional optical connector core position measuring device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Circular motion controller, 2 ... Electrostrictive element, 4a ... Reference optical connector, 4b ... Measurement optical connector, 5a, 5b ... Guide pin hole, 6a, 6b ... Dummy pipe, 7, 8 ... Optical fiber, 10 ... Light branching member, 11 ... light source, 12a-g ...
1st to 7th detectors, 13 CPU, 15a optical fiber front end face, 19, 20 reference member, A position detection means,
B: detection unit.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Shinji Nagasawa 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-5-313075 (JP, A) Hei 6-235845 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G01B 11/00-11/30

Claims (17)

(57) [Claims] A light source that emits measurement light via a light branching member to a rear end surface of each optical fiber, the front end surface of which is fixedly arranged at a predetermined pitch on an end surface of the optical connector to be measured; An electrostrictive element that supports a reference optical connector in which a front end face of each optical fiber is fixedly arranged at a design position on the end face, and a circle that controls a circular motion of the electrostrictive element that supports the reference optical connector; A motion controller, for the core position of each optical fiber fixedly arranged on the end face of the optical connector under test, measuring light emitted from the light source and passing through each optical fiber on the optical connector side under test, respectively; Each of the optical fibers on the side of the optical connector under test is detected through each optical fiber on the side of the reference optical connector, and the reference optical connector is detected from the phase difference between the circular motion and the fluctuation in the amount of light of the measurement light. Measuring the eccentric direction from the center of the optical fiber on the side of the optical connector and measuring the amount of eccentricity from the center of the optical fiber on the side of the reference optical connector from the amplitude of the light quantity fluctuation; apparatus. 2. The apparatus according to claim 1, wherein the position detecting means transmits, for each optical fiber fixedly arranged on the end face of the optical connector to be measured, via an opposing optical fiber of the reference optical connector which is moving in a circular motion. A detector for detecting an amplitude and a phase in a variation in the light amount of the measurement light; for each measurement light detected by each of the detectors, a center of an optical fiber facing the reference optical connector side from a phase difference between the circular motion and the variation in the light amount. 2. The core position measurement of an optical connector according to claim 1, further comprising a CPU for obtaining an eccentric direction from the optical fiber, and obtaining an eccentric amount from a center of the optical fiber on the side of the reference optical connector from an amplitude of the light amount variation. apparatus. 3. The light source is inserted into a through hole at the center of a dummy pipe inserted into at least two guide pin holes formed in the optical connector to be measured, and further toward a rear end face side of the inserted optical fiber. 2. The optical connector core position measuring device according to claim 1, wherein the measuring light is emitted through an optical branching member. 4. A reference optical connector in which a front end face of an optical fiber is opposed to an end face of a measured optical connector fixedly arranged at a predetermined pitch, and a front end face side of each optical fiber is fixedly arranged at a design position on the end face. An electrostrictive element, a circular motion controller that controls a circular motion of the electrostrictive element that supports the reference optical connector, and a measuring light for the core position of each optical fiber fixedly arranged on the end face of the optical connector to be measured. The light exits through each optical fiber on the reference optical connector side that is moving circularly to the front end face of the optical fiber on the measured optical connector side, and is reflected on the rear end face of each optical fiber on the measured optical connector side. The reflected light is detected via each optical fiber on the side of the reference optical connector moving in a circular motion, and for each of the detected reflected light, the reference light connector is determined from the phase difference between the circular motion and the fluctuation in the amount of reflected light. Together determine the direction of decentration from the optical fiber center side, the core position measuring device for an optical connector having a position detecting means for determining the eccentricity of the optical fiber center of the reference optical connector side from the amplitude of the light quantity variation. 5. The apparatus according to claim 1, wherein the position detecting means includes an optical fiber fixedly disposed on the end face of the reference optical connector which circularly moves to a front end face of each optical fiber fixedly disposed on the end face of the measured optical connector. A light source that emits measurement light, and a detector that detects an amplitude and a phase in a light amount variation of the reflected light transmitted through each of the opposing optical fibers on the side of the reference optical connector moving in a circular motion. A detection unit is provided for each optical fiber on the optical connector side to be measured, and for each reflected light detected by each of the detectors, the reference optical connector side is obtained from the phase difference between the circular motion and the variation in the amount of reflected light. A CPU for determining the direction of eccentricity from the center of the opposing optical fiber and calculating the amount of eccentricity from the center of the opposing optical fiber on the side of the reference optical connector from the amplitude of the light amount variation. The core position measuring apparatus for an optical connector according to claim 4, wherein that. 6. In the reference optical connector, a dummy pipe having a through hole at a central portion is inserted into at least two guide pin holes formed for determining a joining position, and an optical signal is further inserted into the through hole. 5. The optical connector core position measuring device according to claim 1, wherein the optical connector has a structure in which a fiber is inserted. 7. The optical connector for measurement inserts a dummy pipe having a through hole in a center portion into at least two guide pin holes formed for determining a joining position, and further includes the through hole. 5. The optical connector core position measuring device according to claim 1, wherein the optical connector has a structure in which an optical fiber is inserted. 8. The reference optical connector according to claim 1, wherein a front end face side of the optical fiber is fixedly arranged at a center position of a guide pin hole to be formed for determining a joining position. Optical connector core position measuring device. 9. The reference optical connector has a structure in which a reference member having a pattern through which measurement light and reflected light are formed is attached to an end face of the optical connector to be measured, the end face facing the end face. Claim 1, 4, or 8
An optical connector core position measuring device as described in the above. 10. The reference member has a diameter equal to a core diameter of an optical fiber fixedly arranged on the end face of the optical connector to be measured on a surface facing the end face of the optical connector to be measured, and has a measurement light and a reflection. 10. The optical connector core position measuring device according to claim 9, wherein the light transmitting pattern is formed at a design pitch at which the optical fiber is to be fixedly arranged. 11. A pattern which opposes the end face of an optical connector to be measured in which a front end face side of an optical fiber is fixedly arranged at a predetermined pitch and reflects a measurement light at a design pitch at which each optical fiber is to be fixedly arranged. An electrostrictive element that supports a reference member formed on the optical member; a circular motion controller that controls a circular motion of the electrostrictive element that supports the reference member; and each optical fiber fixedly arranged on the end face of the optical connector to be measured. With respect to the core position, for each optical fiber on the optical connector side to be measured, measurement light is emitted through a light branching member to the rear end surface of each optical fiber on the optical connector side to be measured, and moves circularly. The reflected light reflected by the pattern formed on the surface of the reference member is detected via the optical fiber on the side of the optical connector to be measured, and the reference member is determined from the phase difference between the circular motion and the variation in the amount of reflected light. A core position of an optical connector including a position detecting means for obtaining an eccentric direction from the center of the pattern formed on the surface and obtaining an eccentric amount from the center of the light reflection pattern formed on the surface of the reference member from the amplitude of the light amount variation. measuring device. 12. A light source for emitting measurement light to a rear end face of the optical fiber on the side of the optical connector to be measured, and the position detecting means is formed on the surface of the reference member which is emitted from the light source and moves in a circular motion. A detection unit comprising a detector for detecting the reflected light reflected by the pattern is provided for each optical fiber on the optical connector side to be measured, and for each reflected light detected by each of the detectors, a circular motion is formed. CPU for determining the eccentric direction of the reference member surface from the opposing pattern center from the phase difference between the reference member surface and the light amount fluctuation of the reflected light, and calculating the eccentric amount of the reference member surface from the opposing pattern center from the amplitude of the light amount fluctuation. The optical connector core position measuring device according to claim 11, further comprising: 13. The reference member has a surface having a diameter equal to a core diameter of an optical fiber fixedly arranged on the end face of the optical fiber to be measured and reflecting the measurement light. 12. The optical connector core position measuring device according to claim 11, wherein the pattern to be formed is formed at a design pitch at which the optical fibers are to be fixedly arranged. 14. The light source is inserted into a through hole at the center of a dummy pipe inserted into at least two guide pin holes formed in the optical connector to be measured, and further toward a rear end face of the inserted optical fiber. 12. The optical connector core position measuring device according to claim 11, wherein the measuring light is emitted. 15. The optical connector according to claim 1, wherein the electrostrictive element causes a reference connector to be supported to circularly move substantially parallel to an end face of the optical connector to be measured. Core position measuring device. 16. The position detecting means determines the eccentric direction and the amount of eccentricity with respect to the designed position of the optical fiber fixedly arranged on the end face of the optical connector to be measured, in advance, to the center of the guide pin hole in the end face of the optical connector to be measured. 12. The optical connector core position measuring device according to claim 1, wherein the calculation is performed by correcting the eccentricity information with the measured eccentricity information. 17. The apparatus according to claim 1, wherein a wavelength of the measurement light emitted from the light source is longer than a cutoff wavelength of a core in the optical fiber.
15. The optical connector core position measuring device according to 5, 11, or 14.